/Engine/Plugins/Media/PixelStreaming/Source/PixelStreaming/Public/IPixelStreamingSignallingConnectionObserver.h
void OnSignallingSFUPeerDataChannels ( [FPixelStreamingPlayerId](API\Plugins\PixelStreaming\FPixelStreamingPlayerId) SFUId, [FPixelStreamingPlayerId](API\Plugins\PixelStreaming\FPixelStreamingPlayerId) PlayerId, int32 SendStreamId, int32 RecvStreamId )